US2547534A - Nut and pipe wrench - Google Patents

Description

April 3, 1951 J. w. OLIVER NUT AND PIPE WRENCH Filed Feb. 28, 1949 R E mm L E O V E W H P E S O l D l ATTORNEYS Patented Apr. 3, 1951 UNITED STATES PATENT OFFICE NUT AND PIPE WRENCH Joseph Wade Oliver, Ferndale, Mich.

Application February 28, 1949, Serial No. 78,810

2 Claims. (CI. 81-78) The invention relates to wrenches and has for its object the obtaining of a construction which is readily engageable with work of a variety of contours of different dimensions.

To this end the invention consists, first, in the construction in which a pair of separate handle members are provided with intermeshing toothed jaw portions and are connected to each other by a series of pivotal clamping links.

The invention further consists in the construction in which the jaws each have an arcuate toothed portion and an extension of the teeth beyond said arcuate portion towards the opposite end of the handle, thereby permitting of adjusting the point of engagement of the one jaw with the other.

The invention further consists in other specific features of the construction as hereinafter set forth.

In the drawings: a

Fig. 1 is a front elevation of the wrench;

Fig. 2 is an endelevation thereof;

Figs. 3, 4 and 5 are diagrammatic views showing the wrench in engagement with work respectively of diiferent contours and dimensions.

As ilustrated A and B are handle members, each having at one end a generally arcuate toothed, or serrated, jaw C and an outwardly extending ear portion D. E, F and G are links arranged in series being pivotally connected to each other at H and H and to the ear D of the members A and B at H and H The length of the links is such that when the handles A and B are together and opposite each other with the jaws C in intermeshing relation, the series of links will form an outward curve as shown in Fig. 1. Preferably the pivots of the links are so positioned in relation to each other and the centers of the arcuate portion C as to form in effect a hexagon with sides of equal length. Thus the space between the centers C, C of the portion C form one side of the hexagon and the space between C' H H H, H H, H C form the other sides. However, this specific arrangement and proportioning is not essential to the invention. The ears D are less in thickness than the handles A and B and are centrally arranged with respect thereto to form recesses on opposite sides thereof. The links E and G are bifurcated to embrace the ears D and to lie in the recess D and the link F is of the thickness of the ears D to be embraced by the bifurcated links E and G. The links E and G are also toothed, or serrated, on their inner sides as indicated at E and G having arcuate end portions and concave portions intermediate the same. The teeth on the arcuate jaws and their extensions are formed in part like gear teeth for intermeshing engagement with each other as indicated at I, these extending around a portion of the arc. The remainder of the arc is, however, preferably provided with sharp teeth, or serrations, I for gripping engagement with the work.

Various uses of the wrench are illustrated in Figures 3, 4 and 5. In Figure 3 an article of circuar cross section is gripped between one of the jaws C and the links E and G. If the diameter of the circle is relatively small (as shown) it is necessary to shift the point of intermeshing engagement of the jaw C on the handle B to a point beyond the arcuate portion on the handle A. Thus the point of engagement between the handles may be shifted in accordance with the size of the article to be gripped. In Figure 4 a hexagonal form is gripped between the jaws C and the outer arcuate portions of the links E and G. The dimensions of the hexagon are such that the centers 0 and C of the handles A and B are directly opposite each other. However, in Figure 5 a smaller hexagon is gripped and the point of engagement of the jaw of the handle B is lowered with respect to that of the handle A. Other polygonal and concentric and eccentric forms of various dimensions may be gripped by suitable adjustment of the point of engagement of the handles A and B with each other.

What I claim as my invention is:

1. A wrench comprising a pair of separate handle members, each having an arcuate jaw portion at one end thereof, intermeshing teeth on said arcuate jaw portions extending along portions of said handles, the teeth of the arcuate portion of one member being engageable in various positions with the teeth of the other member, and. a series of pivotally connected links extending between and connected to said jaw members constituting cooperating jaws.

2. A wrench comprising a pair of separate handle members, each having an arcuate jaw portion at one end thereof, intermeshing teeth on portions of said arcuate jaws and extending along portions of said hande, the teeth on the arcuate portion of one member being engageable in various positions with the teeth of the other member, a series of pivotally connected links extending between and connected to said jaw members constituting cooperating jaws, and gripping teeth on the inner faces of all of said jaws.

JOSEPH WADE OLIVER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 122,638 Neames Jan. 9, 1872 696,659 Thomas Apr. 1, 1902 716,914 Mahlen Dec. 30, 1902 FOREIGN PATENTS Number I Country Date 7,376 Great Britain Mar. 28, 1904 765,522 France Mar. 26, 1934

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